Physics - Heat & Thermo Question with Solution | TestHub

In a small pan of heat capacity $300$ J/${}^{\circ }\mathrm{C}$, we pour $0.5\mathrm{litre}$ water and we put this pan on a stove; heating it at a constant rate. The temperature of the water is plotted in figure (a) against time. There were no heat losses. Then we removed the water from pan and cooled the pan back to $0^{\circ }\mathrm{C}$. We poured $0.7\mathrm{kg}$ alcohol and heat it at the same constant rate. The temperature-time graph is plotted in figure (b). Density of water = $1\mathrm{kg}$/lit., specific heat capacity of water = $4200J/kg$${}^{\circ }\mathrm{C}$.